Redundancy is the duplication of critical components or functions of a system with the intention of increasing reliability of the system, usually in the case of a backup or fail-safe.
Questions tagged [redundancy]
300 questions
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Strategies for detecting corruption in Greyhole pools
Are there any good strategies for proactively detecting data corruption in a Greyhole pool.
Suppose the following chain of events happens.
c:\> copy swiss_bank_account.txt \\greyhole\safe_documents
Greyhole does its thing and replaces:
…
Kennet Belenky
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VPN redundancy, failover
I am making a project for school with 3 offices wich are connected with vpn, the main server infrastructure is located in the head office and i am trying to remove all the single point of failures. But you can use failover clusters all you want but…
Distracted
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How to connect drive array to redundant motherboards?
How should one connect a small storage array, four 3TB SATA drives for now, to two motherboards or controllers as a failover system? This means avoiding adding another single point of failure such as a single SAN device. A perfect world would have a…
tyblu
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How to debug/fix a php/apache segmentation fault while using memcache (redundant) for session storage?
os: debian squeeze (up2date)
2 apache mod php webserver
2 memcache server
i have to apache mod_php nodes which use two memcache server for redundant session storage (used variant 3 from https://serverfault.com/a/165584).…
c33s
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Cname and Amazon S3 failure
I had a quick question. If you set up a cname for your amazon bucket and lets say your main amazon s3 bucket goes down, does cname you created serve files, in other words, do your files get redirected to cname if your main amazon s3 bucket goes…
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Can we route video on my redundant link while the primary is up and turn it off if the primary fails over to secondary?
We have a remote location that is currently routing data over a satellite connection.
I am adding a cellular fail over if the satellite goes down.
I have been asked to install video cameras that will stream video, but this takes a lot of bandwidth…
user45741
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Two trunks from two switches to router
I want to connect two switches with 6 vlans to a router. Both switches are connected to other switches and are there for redundancy. Router doesn't let me put same default gateways on both interfaces (or better say, all subinterfaces of both…
philotanus
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HP P410i as online spare
Is it possible to have dual P410i SAS controllers and use one for a online spare? I am fairly new to HP servers and I will be setting up a new G7 for production use.
I have been reading about HP's S.M.A.R.T. but have not seen the option to make a…
TimK
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What is the industry standard solution for linux web server and mac file server failover systems?
I am a web developer at my company and am therefore qualified to be an IT guy, apparently. I have a single Ubuntu web and file server currently, but I want to break up the server tasks onto two different systems, both of which I want to be highly…
cfree
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Is it possible to do storage without RAID and unnecessary redundancy?
I'm building multiple storage nodes for Riak database. Each node contains 20-40 x 2TB drives. Riak replicates each save to 3 nodes so there I have redundancy. Now the question is that what's the best and most efficient way to create one "virtual…
James
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Switch Redundancy for iSCSI
I am about to implement an iSCSI solution on our network. The thing that is bothering me though is that we are only using 1 switch from the SAN to node connections. Since each node has 2 NICs, is anyone able to give me some tips on how to set up a…
jtnire
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Placing UPS in front of STS; Connecting Dual PSU to same PDU
The site has 2 x 16A @ 230V, each server/SAN has dual PSU set up.
Options:
1) [2 x 16A] ---> [1 x STS or ATS]----> [1 xUPS]---->[2 x PDU]----->[DUAL PSU]
As can be seen the server is actually connected to the same UPS in the end even though via…
BOBA_FETT_81
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Windows Server 2008 multiple domain controllers?
We currently have a domain controller which has the profiles etc. for around 30 users. It is also the local DNS server and file server.
As it's our only Domain Controller, if we ever have to restart the server or it loses network connectivity then…
dannymcc
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Cisco 6500 redundancy
Which of the following methods is best for redundancy in a Cisco 6500?
Two Cisco 6500 chassis each with a single Sup720 and other modules.
One Cisco 6500 chassis with two Sup720 modules and two of each of the other modules.
Stokie Mike
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"Simple" Failover to a Geographically Separated Server?
I've been reading about DNS failovers and a bunch of other technical terms however I'm a bit of a newbie in this so it all sounds Greek to me. Basically here's what I just need:
I have two shared hosting accounts from two different providers (Server…
IMB
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